This doesn't upset me at all, and it seems more that the OP wants to brag that he knew the Finnish flag than his friend being ignorant. The lady he was with was probably making a silly joke, just like I do when I don't know something (amg who needs to know this stuff....?). I'm sure there are things that some people find important that OP doesn't know a thing about. Or similarly, we have millions of people who have no idea how computers work but it also doesn't make me look down my nose at them when I get all the computer Jeopardy question correct and they didn't.